The mass concentration in mg/L of a carbon compound (C6H12O6N2) measured in a water sample is three times higher than NH3 mass concentration. The ThOD for both carbon and nitrogen oxidation are 384 mg/L. What is the concentration of NH3 (mg/L) in water sample? (Molecular weight: C6H12O6N2= 208; NH3 = 17; O2 = 32) Assume, NH3 concentration = x mg/L C6H12O6N2 concentration = 3x mg/L NH3 C6H12O6N2 + O2 NH3 + O2 + + CO2 + H2O + NO3 + H + H20

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)